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Prime string of five consecutive integers from 9 to 13 whereby the composite numbers are replaced by the concatenation of their prime factors (counting multiplicity) {3*3}{2*5}{11}{2*2*3}{13}. Replacing the composites by the sum of these prime factors yields yet another prime 6711713 or {6}{7}{11}{7}{13}. [De Geest]

 

  Submitted: 2003-02-08 21:47:05;   Last Modified: 2008-01-30 11:28:00.



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